Many Years Ago I Was Told By A Doctor That

Many years ago I was told by a doctor that I had a cyst(s) on my epididymis, and this was back in 2003. For many years, off and on), I have had discomfort in that area. Some times I don't have any minor pain, and this can go for 2 years at a time. Recently, I've noticed little black specks in semen. I first noticed it in 2009...but as of today it seems to be more noticeable. What can be the cause of this? I do, at the moment, have some discomfort on the left side of testicles, sometimes shifting to the right. Please help.